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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 546 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.7/8 − 5/6 =
  2. 2.4/5 − 1/4 =
  3. 3.Kabir has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  4. 4.A bottle has 4/5 litre of juice. Diya drinks 3/10 litre. How much juice is left (in litres)? =
  5. 5.A bottle has 1/6 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 1/3 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  7. 7.A tank is 5/6 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  8. 8.A bottle has 7/10 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  9. 9.4/9 − 1/6 =
  10. 10.5/8 − 1/6 =
  11. 11.8/9 − 2/3 =
  12. 12.1/4 − 1/5 =
  13. 13.Sara has a ribbon 3/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  14. 14.9/10 − 4/5 =
  15. 15.1/2 − 4/9 =
  16. 16.Vihaan has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  17. 17.1/3 − 2/7 =
  18. 18.2/3 − 4/7 =
  19. 19.3/4 − 1/7 =
  20. 20.A bottle has 5/6 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 2/7 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.1/2 − 2/9 =
  23. 23.Vihaan has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  24. 24.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  25. 25.Meera has a ribbon 4/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  26. 26.3/4 − 3/8 =
  27. 27.1/2 − 3/8 =
  28. 28.Rohan has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 7/10 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  30. 30.6/7 − 1/3 =
  31. 31.3/8 − 1/3 =
  32. 32.5/7 − 2/3 =
  33. 33.5/6 − 1/3 =
  34. 34.2/3 − 3/7 =
  35. 35.Aarav has a ribbon 3/4 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  36. 36.5/7 − 1/2 =
  37. 37.A bottle has 2/3 litre of juice. Sara drinks 5/8 litre. How much juice is left (in litres)? =
  38. 38.3/8 − 1/6 =
  39. 39.A bottle has 5/6 litre of juice. Riya drinks 4/9 litre. How much juice is left (in litres)? =
  40. 40.3/4 − 4/7 =

Answer key

  1. 1/24
  2. 11/20
  3. 11/18
  4. 1/2
  5. 1/18
  6. 2/15
  7. 7/12
  8. 1/30
  9. 5/18
  10. 11/24
  11. 2/9
  12. 1/20
  13. 13/20
  14. 1/10
  15. 1/18
  16. 13/20
  17. 1/21
  18. 2/21
  19. 17/28
  20. 19/30
  21. 1/28
  22. 5/18
  23. 1/30
  24. 7/18
  25. 1/2
  26. 3/8
  27. 1/8
  28. 1/2
  29. 1/30
  30. 11/21
  31. 1/24
  32. 1/21
  33. 1/2
  34. 5/21
  35. 7/20
  36. 3/14
  37. 1/24
  38. 5/24
  39. 7/18
  40. 5/28

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